The Judges' Houses locations for Gary Barlow, Sharon Osbourne and Louis Walsh have now been confirmed, along with the guest mentors helping them make crucial choices ahead of the live shows.

Barlow's final six groups will head to New York to perform for the veteran boyband star, who will be joined by former X Factor contestant Olly Murs. The over-25s will join Osbourne in Los Angeles, where Robbie Williams will return as a guest mentor.

Meanwhile, Walsh has three professionals on hand as he selects the final acts for the boys category. All Saints' Nicole Appleton, former Westlife star Shane Filan and Judges' Houses veteran Sinitta will help Walsh welcome his chosen six acts in Saint Tropez.

The Judges' Houses rounds begin on Saturday, October 5 at 8.20pm on ITV1.